<?php // $Id: edit_sentence.class.php,v 1.7 2007/10/10 05:25:16 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This class will provide the interface for all the edit sentence actions

class edit_sentence extends XMLDBAction {

	/**
	 * Init method, every subclass will have its own
	 */
	function init() {
		parent::init();

	/// Set own custom attributes

	/// Get needed strings
		$this->loadStrings(array(
			'change' => 'xmldb',
			'vieworiginal' => 'xmldb',
			'viewedited' => 'xmldb',
			'back' => 'xmldb'
		));
	}

	/**
	 * Invoke method, every class will have its own
	 * returns true/false on completion, setting both
	 * errormsg and output as necessary
	 */
	function invoke() {
		parent::invoke();

		$result = true;

	/// Set own core attributes
		$this->does_generate = ACTION_GENERATE_HTML;

	/// These are always here
		global $CFG, $XMLDB;

	/// Do the job, setting result as needed
	/// Get the dir containing the file
		$dirpath = required_param('dir', PARAM_PATH);
		$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);

	/// Get the correct dirs
		if (!empty($XMLDB->dbdirs)) {
			$dbdir =& $XMLDB->dbdirs[$dirpath];
		} else {
			return false;
		}
		if (!empty($XMLDB->editeddirs)) {
			$editeddir =& $XMLDB->editeddirs[$dirpath];
			$structure =& $editeddir->xml_file->getStructure();
		}

	/// ADD YOUR CODE HERE

	/// Fetch request data
		$statementparam = required_param('statement', PARAM_CLEAN);
		$sentenceparam  = optional_param('sentence', NULL, PARAM_CLEAN);

		if (!$statement =& $structure->getStatement($statementparam)) {
			$this->errormsg = 'Wrong statement specified: ' . $statementparam;
			return false;
		}
		$sentences =& $statement->getSentences();

	/// If no sentence has been specified, edit the last one
		if ($sentenceparam === NULL) {
			end($sentences);
			$sentenceparam = key($sentences);
		}

		if (!$sentence =& $sentences[$sentenceparam]) {
			$this->errormsg = 'Wrong Sentence: ' . $sentenceparam;
			return false;
		}

		$dbdir =& $XMLDB->dbdirs[$dirpath];
		$origstructure =& $dbdir->xml_file->getStructure();

	/// Based in the type of statement, print different forms
		if ($statement->getType() != XMLDB_STATEMENT_INSERT) {
		/// Only INSERT is allowed!!
			$this->errormsg = 'Wrong Statement Type. Only INSERT allowed';
			return false;
		} else {
		/// Prepare INSERT sentence
			$fields = $statement->getFieldsFromInsertSentence($sentence);
			$values = $statement->getValuesFromInsertSentence($sentence);

		/// Add the main form
			$o = '<form id="form" action="index.php" method="post">';
			$o.= '<div>';
			$o.= '	<input type="hidden" name ="dir" value="' . str_replace($CFG->dirroot, '', $dirpath) . '" />';
			$o.= '	<input type="hidden" name ="statement" value="' . $statementparam .'" />';
			$o.= '	<input type="hidden" name ="sentence" value="' . $sentenceparam .'" />';
			$o.= '	<input type="hidden" name ="action" value="edit_sentence_save" />';
			$o.= '	<input type="hidden" name ="postaction" value="edit_statement" />';
			$o.= '	<table id="formelements" class="boxaligncenter">';
		/// The fields box
			$o.= '	<tr><td>INSERT INTO ' . s($statement->getTable()) . '</td></tr>';
			$o.= '	<tr><td><textarea name="fields" rows="2" cols="70" id="fields">' . s(implode(', ', $fields)) . '</textarea></td></tr>';
		/// The values box
			$o.= '	<tr><td>VALUES</td></tr>';
			$o.= '	<tr><td><textarea name="values" rows="2" cols="70" id="values">' . s(implode(', ', $values)) . '</textarea></td></tr>';
		/// The submit button
			$o.= '	  <tr valign="top"><td><input type="submit" value="' .$this->str['change'] . '" /></td></tr>';
			$o.= '	</table>';
			$o.= '</div></form>';
		/// Calculate the buttons
			$b = ' <p class="centerpara buttons">';
		/// The back to edit statement button
			$b .= '&nbsp;<a href="index.php?action=edit_statement&amp;statement=' . urlencode($statementparam) . '&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a>';
			$b .= '</p>';
			$o .= $b;

			$this->output = $o;
		}

	/// Launch postaction if exists (leave this here!)
		if ($this->getPostAction() && $result) {
			return $this->launch($this->getPostAction());
		}

	/// Return ok if arrived here
		return $result;
	}
}
?>
